Radio had a great influence on people in 1920s - it was the first such invention which let people know what happens on the other side of the world in a very short time. Its influence was comparable to today's influence of TV or Internet. So it probably shaped modernism (and any other movement) by inspiring people to do things they haven't seen or heard in their area before.
by creating mass media
Radio revolutionized communication and entertainment in the 1920s, allowing real-time news dissemination and cultural diffusion. It created shared experiences and community traditions, while also opening up new avenues for commercialization and political engagement. Its impact fundamentally shaped modernism and American culture during this era.
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